High thermal conductivity medium temperature form-stable phase change material and preparation method thereof

A shape-fixed phase change, high thermal conductivity technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of time and space difference, achieve improved performance, simple preparation method, high phase change latent heat and thermal conductivity Effect

Inactive Publication Date: 2015-08-19
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are usually differences in time and space between the generation of industrial waste (waste) heat and the utilization of heat energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Preparation of suspension: Take 0.1g of expanded graphite, mix it with 40mL of absolute ethanol in a round bottom flask, and ultrasonically treat it for 1 hour to break the expanded graphite into nano-expanded graphite flakes and obtain a nano-expanded graphite flake / absolute ethanol mixture ; Add 2.0g erythritol, 0.7g polyethylene glycol 10000 and 60mL absolute ethanol to the above mixture, put it in a water bath at 75°C, reflux and stir to completely dissolve the erythritol and polyethylene glycol, then stop Heat, stir vigorously, and let the system cool down to room temperature to obtain a stable suspension.

[0020] 2) Cooling of the suspension: Add 0.51 g of aniline and 2 mL of concentrated hydrochloric acid to the suspension, stir and mix evenly, then transfer the mixture into an ice-water bath, stir vigorously and lower the temperature of the mixture to 0-5°C.

[0021] 3) Aniline polymerization: 2.658 g of benzoyl peroxide was added to the above mixture at 0-5...

Embodiment 2

[0026] 1) Preparation of suspension: Take 0.64g of expanded graphite, mix it with 40mL of absolute ethanol in a round-bottomed flask, and ultrasonicate for 3 hours to break the expanded graphite into nano-expanded graphite flakes and obtain a nano-expanded graphite flake / absolute ethanol mixture ; Add 2.0g erythritol, 0.7g polyethylene glycol 10000 and 60mL absolute ethanol to the above mixture, put it in a water bath at 75°C, reflux and stir to completely dissolve the erythritol and polyethylene glycol, then stop Heat, stir vigorously, and let the system cool down to room temperature to obtain a stable suspension.

[0027]2) Cooling of the suspension: Add 0.51 g of aniline and 2 mL of concentrated hydrochloric acid to the suspension, stir and mix evenly, then transfer the mixture into an ice-water bath, stir vigorously and lower the temperature of the mixture to 0-5°C.

[0028] 3) Aniline polymerization: 2.658 g of benzoyl peroxide was added to the above mixture at 0-5°C to i...

Embodiment 3

[0033] 1) Preparation of suspension: Take 0.05g of graphene, mix it with 40mL of absolute ethanol in a round bottom flask, and sonicate for 1 hour to obtain a graphene / absolute ethanol mixture; add 2.0g of erythritol to the above mixture, Put 1g of polyethylene glycol 10000 and 40mL of absolute ethanol in a water bath at 70°C, reflux and stir to completely dissolve erythrose and polyethylene glycol, stop heating, stir vigorously, and let the system cool down to room temperature to obtain a stable suspension .

[0034] 2) Cooling of the suspension: Add 0.35 g of aniline and 8 mL of concentrated hydrochloric acid to the suspension, stir and mix evenly, then transfer the mixture into a cold water bath, stir vigorously and lower the temperature of the mixture to 5-15 °C.

[0035] 3) Aniline polymerization: Add 2.738 g of benzoyl peroxide to the above mixture at 5-15 °C to initiate the polymerization of aniline, and allow the mixture to heat up naturally for 24 hours.

[0036] 4) ...

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Abstract

The invention relates to a high thermal conductivity form-stable phase change thermal energy storage material and a preparation method thereof. According to the form-stable phase change thermal energy storage material, carbon nano-materials are taken as heat conductive fillers, water-soluble sugar alcohol is taken as phase change thermal energy storage material, polyaniline is taken as backing material. The preparation of the form-stable phase change thermal energy storage material comprises the following steps of firstly dispersing the carbon nano-materials into ethyl alcohol through an ultrasonic dispersion method, then adding the sugar alcohol and a surfactant to form stable suspension through a method of heating, dissolving, and cooling to separate out, then adding aniline and acid and mixing uniformly, and further adding a oxidizing agent to polymerize the aniline into the polyaniline, so as to obtain the form-stable phase change material after purification and separation. The method has the advantages of simple process and low cost, the obtained form-stable phase change material has very high latent heat of phase change and heat-conducting property, is stable in performance and is no need to be packaged, the performance of a sugar alcohol phase change material is effectively improved, the application range of the sugar alcohol phase change material is expanded, and the material can be widely applied in various fields, such as medium temperature solar energy thermal utilization and recovery of industrial waste heat.

Description

technical field [0001] The invention relates to the preparation of a composite shape-changing heat storage material, specifically a nano-carbon material as a heat-conducting filler with high phase-change latent heat and thermal conductivity, and when the temperature is lower than or higher than its phase-change temperature A medium-temperature composite shape-fixed phase-change heat storage material that is solid and stable in shape and a preparation method thereof. Background technique [0002] The energy currently used by people is mainly fossil energy such as oil and coal. However, the high price of fossil energy and the increasingly serious environmental problems make people pay more and more attention to the development and utilization of clean energy and the efficient use of energy. Among them, the outstanding representative of clean energy is solar energy, and industrial waste (waste) heat recovery is an effective means to improve energy utilization efficiency. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 曾巨澜周磊贺定国孙赛玲童海霞喻林萍曹忠
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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